From 5c6be06b9b1932e5b35f77a4bce8c115a62e2c62 Mon Sep 17 00:00:00 2001
From: Ruslan Sayfutdinov <sayfutdinov@fb.com>
Date: Thu, 8 Sep 2022 10:31:57 -0700
Subject: [PATCH] update rust toolchain

Summary:
It includes this fix which was backported to 1.62.1.
https://github.com/rust-lang/rust/pull/98950

`2022-08-06` is what will become 1.64.0.

Changes are caused by:
- Split TypeVisitable from TypeFoldable: https://github.com/rust-lang/rust/pull/98206
- Remove `fn backtrace` and replace with usages of provider API: https://github.com/rust-lang/rust/pull/99431

Reviewed By: stepancheg

Differential Revision: D39277984

fbshipit-source-id: 5afc6c2b9e5ee3074ea0ede995868aef12cebf14
---
 gazebo_lint/Cargo.toml | 1 +
 gazebo_lint/src/lib.rs | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/gazebo_lint/Cargo.toml b/gazebo_lint/Cargo.toml
index 0306193..99f1334 100644
--- a/gazebo_lint/Cargo.toml
+++ b/gazebo_lint/Cargo.toml
@@ -11,4 +11,5 @@ repository = "https://github.com/facebookincubator/gazebo_lint"
 plugin = true
 
 [dependencies]
+rustversion = "1.0"
 smallvec = "1.4"
diff --git a/gazebo_lint/src/lib.rs b/gazebo_lint/src/lib.rs
index e1359f0..44f6c79 100644
--- a/gazebo_lint/src/lib.rs
+++ b/gazebo_lint/src/lib.rs
@@ -72,7 +72,10 @@ use rustc_lint::LateLintPass;
 use rustc_lint::Lint;
 use rustc_lint::LintContext;
 use rustc_lint::LintId;
+#[rustversion::before(1.64)]
 use rustc_middle::ty::fold::TypeFoldable;
+#[rustversion::since(1.64)]
+use rustc_middle::ty::visit::TypeVisitable;
 use rustc_middle::ty::TyKind;
 use rustc_span::Span;
 use rustc_span::Symbol;